UI Spoofing in Google Chrome Extensions

Publication date: 2026-06-30

Last updated on: 2026-07-01

Assigner: Chrome

Description

Insufficient validation of untrusted input in Extensions in Google Chrome prior to 150.0.7871.47 allowed an attacker who convinced a user to install a malicious extension to perform UI spoofing via a crafted Chrome Extension. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-30

Last Modified

2026-07-01

Generated

2026-07-21

AI Q&A

2026-07-01

EPSS Evaluated

2026-07-19

NVD

CVE-2026-13999

EUVD

EUVD-2026-40687

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 150.0.7871.47 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves insufficient validation of untrusted input in Google Chrome Extensions prior to version 150.0.7871.47. An attacker who convinces a user to install a malicious extension can exploit this flaw to perform UI spoofing by crafting a specially designed Chrome Extension.

Impact Analysis

The vulnerability can impact users by allowing attackers to perform UI spoofing, which means the attacker can create fake user interface elements that appear legitimate. This can lead to users being tricked into performing unintended actions or disclosing sensitive information.

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